Nemoria lixaria

The combination of bright green wings with contrasting red borders distinguishes this species from other North American emerald moths. Similar Nemoria species lack the distinct red marginal band or show different color patterns. The red-bordered emerald can be confused with other green geometrids, but the specific pattern of red restricted to the wing margins is diagnostic. Examination of genitalia may be required for definitive identification in some cases.

Adults display bright emerald green wings with a prominent red or reddish-pink border along the outer margins of both forewings and hindwings. The wings are relatively broad and rounded, with a delicate, powdery scaling typical of emerald moths. Body is slender and green, matching the wing color. Wingspan approximately 20–25 mm.

Deciduous and mixed forests, woodland edges, and areas with abundant oak vegetation. Adults are frequently found in habitats supporting their larval host plants.

North America, with records from the eastern United States west to Texas and north into southern Canada. Distribution appears to correspond with the range of oak species.

Adults are active primarily from late spring through summer, with peak activity typically in May through July depending on latitude. Multiple generations may occur in southern portions of the range.

• Quercus - larval hostOak species; specific associations inferred from genus-level records for Nemoria

Adults are nocturnal and attracted to light. They rest with wings spread flat or slightly folded, displaying the characteristic red-bordered pattern. Larvae are likely twig-mimics, a common trait in Nemoria species, though this specific behavior has not been directly documented for N. lixaria.

Larvae function as herbivores on oak foliage, contributing to nutrient cycling in forest ecosystems. Adults serve as prey for nocturnal insectivores including bats and birds.

Occasionally encountered by moth enthusiasts and photographers due to its attractive coloration. No significant economic impact; not considered a pest species.

• Nemoria bistriariaAlso green with red markings, but shows two red stripes across the wings rather than marginal borders
• Nemoria darwiniataGreen with variable markings but lacks the consistent red marginal band; more northern distribution
• Other GeometrinaeVarious green emerald moths lack the distinctive red-bordered wing pattern

• moth
• geometrid
• emerald moth
• North America
• oak-associated

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life